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Energy Storage

Storing energy for later use is a key mechanism which enables smarter, more flexible energy systems particularly as we continue to decarbonise our energy system with the growth of renewable generation. The benefits will become even more pronounced as investments in battery technology continue and increasing large scale production sees the price of batteries decrease.

For community energy projects, incorporating energy storage has the following benefits:

  • Enables increased output, and therefore revenue, from renewable energy projects particularly in constrained areas
  • Allows connection to the grid more quickly in constrained areas
  • Helps to reduce the variation in power output from intermittent generators and smooth the normal peaks and troughs of the daily load profile
  • Helps energy consumers to manage their energy demand, use their energy more flexibly and save money on their bills
  • Provides secure and resilient energy supplies during power outages.

Lithium-ion batteries are one of the most common types of electrical energy storage technologies which are being used in the majority of new and planned grid-scale energy storage projects, domestic properties and Electric Vehicles.

HIE’s Electrical Energy Storage module offers more detail on the different types of electrical energy storage and their applications.

 

Thermal storage is a means to store excess heat and there are two main types. Thermal stores which have proved to work particularly well with renewable technologies such as wood-fuelled biomass boilers, heat pumps, wind energy and solar water heating systems; and heat batteries which use Phase Change Materials (PCM) which absorb and release thermal energy during the process of melting and freezing.

Many homes already have thermal storage capacity in the form of simple insulated hot water tanks. This allows water to be heated and used at a later time. The benefits of thermal storage are similar to that of electrical energy storage.

 

Community Projects Incorporating battery (Including EVs) or thermal storage:

 
 

View the Energy Saving Trust’s Energy Storage page for more information on electrical and thermal energy storage.

 

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